Home / 3,178.13-4,385.82-1,780.88

Finding the Fourth Proportional to 3,178.13, 4,385.82 and 1,780.88

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Solution

The fourth proportional to 3,178.13, 4,385.82 and 1,780.88 is: 2,457.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.13 : 4,385.82 = 1,780.88 : x
  2. Step 2: Convert to fraction form
    3,178.13/4,385.82 = 1,780.88/x
  3. Step 3: Cross multiply
    3,178.13x = 4,385.82 × 1,780.88
  4. Step 4: Simplify right side
    3,178.13x = 7,810,619.12
  5. Step 5: Solve for x
    x = 7,810,619.12/3,178.13
  6. Step 6: Final answer
    x = 2,457.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.